Self-drilling screws with a hex/flange head and EPDM washers, designed for fixing sheet metal to timber frames. These screws feature a slash point for faster insertion and an Elementech anti-corrosion coating for enhanced durability. The integrated 16mm rubber washer, positioned beneath the aluminium flange, expands under pressure to create a permanent weather seal. They are salt spray tested to withstand 1,000 hours of exposure. Specifically designed for roofing applications, these screws provide a reliable and long-lasting solution for attaching cladding and sheet metal to timber structures. The Elementech coating ensures superior resistance to corrosion, making them suitable for demanding environments. The slash point technology allows for improved and speedier insertion, saving time during installation. Forgefix TechFast Sheet To Timber Hex/Washer Roof Screw 6.3 x 32mm (100 Pack) in Silver Rubber.